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Full text of "The Cambridge Natural History"

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The first of these characters is the series of additional
zygapophyses on the posterior dorsal and lumbar vertebrae;
these are very clear in the Anteaters and Armadillos; less clear,
but still obviously represented, in the Sloths. In the second
place, they all possess a clavicle., rudimentary, it is true, in the

Fia. 89.—Great Anteater (Afyrmecophoffa fit&ata). A, Side view of twelfth and thirteenth
thoracic vertebrae. B, Posterior surface of second lumbar vertebra, C, Anterior
surface of third lumbar vertebra, x §. a.z, Anterior zygapophysis ; CKs1, a^r oaf,
additional anterior articular facets ; cc, facet for capitulum of rib j m, meta-
pophysis j pz, posterior zygapophysis ; pz\ p&, pz*, additional posterior articular
facets ; t, transverse process ; tct facet for articulation of tubercle of rib. (From
Flower's Osteology.)
Great Ant-bear, but still present. Thirdly, the testes are
abdominal throughout life, a character which they share with
such lowly-organised animals as the Monotremata and the
Whales. Finally, -and this is by no means a matter to be over-
looked, not only are all the existing members of this group
American in range, but there is no evidence to prove that they
have ever existed elsewhere. Ko European or Old-World repre-